The first day of trilateral talks between the United States, Ukraine, and Russia in Abu Dhabi was constructive and substantive, Ukrainian President Volodymyr Zelenskyy wrote on Telegram, Report informs. We first held talks with our European and American partners, followed by a trilateral meeting between our delegation and the American and Russian delegations. I am grateful to all Ukraine's partners for their support.The trilateral format was constructive and quite substantive.